pipe ?fileId_var_r ?fileId_var_w
Create a pipe. If fileId_var_r and fileId_var_w are specified, then pipe will set the a variable named fileId_var_r to contain the fileId of the side of the pipe that was opened for reading, and fileId_var_w will contain the fileId of the side of the pipe that was opened for writing.
If the fileId variables are not specified, then a list containing the read and write fileIdw is returned as the result of the command.
There is a proposal tclx file commands for core [seems like something is missing here...]
[We also could talk about the abstract notion of "pipe", and how it comes up in conversation far more than just its use in reference to this command.]
Can somebody give an example for this? My attempt to use
package require Tclx pipe rpipe wpipe; puts $wpipe "test\n"; read $rpipe
simply leads to a lock up. Any help appreciated ;)
Category Command for TclX package.